Dr. Kim’s Approach: LDN Therapy San Antonio, Texas

Low Dose Naltrexone in San Antonio:

Why It Works, and Why Dr. Kim

Yoon Hang Kim, MD, MPH

Board-Certified in Preventive Medicine  |  Integrative & Functional Medicine Physician

Living with a chronic condition can feel like working through a to-do list that never quite ends. You try a medication, a symptom quiets down for a while, and the thing underneath it never really moves. If that sounds familiar, Low Dose Naltrexone — usually just called LDN — is worth understanding, because it starts from a different place. Instead of masking a symptom, it asks the body to recalibrate.

I've spent more than twenty years practicing integrative and functional medicine, and I lead one of the largest online LDN education communities anywhere. Let me walk you through what LDN is, why so many people here in San Antonio are asking about it, and what makes the care model different.

What LDN Actually Does

Naltrexone was first approved at high doses — around 50 mg — to treat alcohol and opioid dependence. LDN uses a small fraction of that, typically 1 to 4.5 mg once daily. At that low dose, it behaves in a completely different way. Research suggests it briefly and gently blocks opioid receptors, which prompts the body to raise its own endorphin levels and to calm an overactive inflammatory response in the nervous system, partly by modulating a receptor called Toll-like receptor 4 (Toljan & Vrooman, 2018). Reviews of the chronic-pain literature describe LDN as acting less like a painkiller and more like a novel anti-inflammatory that quiets the glial cells of the central nervous system (Younger, Parkitny & McLain, 2014).

A useful way to picture it: LDN doesn't drown out the signal — it helps retune the system that keeps sending it.

Why People in San Antonio Are Asking About It

The interest isn't hype. LDN is inexpensive, taken once a day at bedtime, and generally well tolerated, which makes it appealing to people who've grown wary of medications that trade one problem for another. What it does require is a physician who understands the nuance — the right starting dose, how to titrate over time, how it fits alongside the rest of your health picture, and where a compounding pharmacy comes in. That's exactly where the choice of provider matters.

Why Dr. Kim

Here's the honest differentiator. Plenty of clinics can write an LDN prescription. Far fewer have spent years living inside the LDN world. I founded and lead an online LDN community with more than 9,000 members, I've written two books on LDN, and I've watched this therapy help real people across a wide range of conditions. That depth changes the quality of the conversation you and I get to have.

How the practice is built matters just as much. Care through www.directintegrativecare.com is membership-based and insurance-free by design — which means appointments aren't rushed, and the plan is genuinely yours rather than a template. We start by understanding your full history and looking for root causes, not just the loudest symptom. When LDN is a fit, it becomes one carefully chosen piece of a larger, personalized plan.

Conditions LDN May Help

LDN has shown the most promise in conditions that involve immune dysregulation and inflammation. In published reports and reviews, that includes:

• Autoimmune conditions such as multiple sclerosis

• Fibromyalgia and other chronic pain syndromes

• Chronic fatigue syndrome

• Inflammatory bowel conditions, including Crohn's disease

• Complex regional pain syndrome

LDN isn't a cure, and it isn't right for everyone. But for the right person, it can be a meaningful part of feeling like themselves again.

What to Expect

• We begin with a thorough consultation — your history, your goals, and whether LDN makes sense for you.

• If it does, we typically start low (often around 1.5 mg at bedtime) and adjust gradually.

• We follow up, track your response, and fine-tune. Some people notice vivid dreams early on; these usually settle.

• Benefits tend to build over weeks to months, so patience and communication are part of the process.

Learn More: Books by Dr. Kim

If you'd like to go deeper, I've written two books on Low Dose Naltrexone, both available on Amazon:

• The Low Dose Naltrexone (LDN) Primer: 2026 Edition — a 133-page, plain-language guide for anyone new to LDN, covering how it works, what to expect, and its use in conditions such as fibromyalgia, Long COVID, and Hashimoto's thyroiditis.

• LDN for Clinicians — a comprehensive clinical reference for practitioners who want to understand and prescribe LDN with confidence.

Taking the Next Step

If you're ready to explore a root-cause approach to a chronic condition — and to work with a physician who knows LDN inside and out — I'd be glad to help. You can learn more and request a consultation at www.directintegrativecare.com.

Your body has a real capacity to heal. Sometimes it just needs the right key.

In health,

Yoon Hang Kim, MD, MPH

About Dr. Kim

Dr. Yoon Hang “John” Kim is a board-certified physician with more than 20 years of experience in integrative and functional medicine. He completed a fellowship in integrative medicine under Dr. Andrew Weil at the University of Arizona and holds board certifications in Preventive Medicine and Integrative & Holistic Medicine, along with medical acupuncture training. He specializes in Low Dose Naltrexone (LDN), autoimmune conditions, chronic pain, integrative oncology, fibromyalgia, chronic fatigue syndrome, mast cell activation syndrome (MCAS), and mold toxicity. He is the author of 3 books and more than 20 peer-reviewed articles.

Professional: www.yoonhangkim.com   |   Clinical: www.directintegrativecare.com

References

Younger J, Parkitny L, McLain D. The use of low-dose naltrexone (LDN) as a novel anti-inflammatory treatment for chronic pain. Clin Rheumatol. 2014;33(4):451–459.

Toljan K, Vrooman B. Low-Dose Naltrexone (LDN)—Review of Therapeutic Utilization. Med Sci (Basel). 2018;6(4):82.